I get the same grind and I know someone else in Bucharest who has this issue as well. I had my clutch replaced at 7000km and it improved the shifting, it was notchy before, much better after, but I still get the grind sometimes.
My dealership was great about it. They said no question about it, not shifting right (they couldn't replicate the grind), we'll replace the clutch and go from there. I now only get it 1/20 or 30 launches. I would get it more than 50% of the time before.
And I've heard people at the M Driving School doing it on 1-2. People who could obviously drive properly. I just learned to live with it, either shift slower, or not get angry when it does it.